Combine beans in a pan with water and onions.,Bring to a boil, cover and remove from heat for 2 hours (or soak beans in cold water overnight).,Return to heat, bring to boil and simmer slowly until beans are very tender, about 3 hours.,Mash beans with a potato masher and add bacon drippings, butter or lard.,Mix well and continue cooking, stirring frequently until beans are thickened and fat is absorbed.,______,Serve or reheat.,Makes 6 to 8 servings.